Jay-Z says he’s “a business, man,” but that isn’t stopping him from giving his fans a bargain to christen Brooklyn’s new Barclays Center.

Roughly 7,000 of the 14,586 seats for the rap mogul’s Sept. 28 concert to officially open his NBA Nets’ new home will be priced at $29.50 each, or $37.20 including Ticketmaster fees.

The part-owner in the Nets — who is also on the board of the arena rising at Flatbush and Atlantic avenues — also announced that he’s added two shows for Sept. 29 and Sept. 30 at the same modest pricing. All tickets go on sale Friday.

“The artist dictates the pricing, and Jay-Z has said from the start that these concerts are all about celebrating Brooklyn, and he wanted everyone who wants to come to be able to attend,” Barclays Center CEO Brett Yormark told The Post. “This shows how committed he is to Brooklyn.”

The rapper — who is also bringing his 40/40 Club to the arena — grew up in the Marcy Projects in Bedford-Stuyvesant.

Although the arena holds 18,200 for basketball, many of the seats behind the stage are not being offered for the shows. Those seeking the best views in the lower bowl area will have to fork over anywhere from $59.50 to $254.50.

However, pricing for these seats dwarf in comparison to what Barclays Center is charging for other top acts later this year.

For example, stage area seats for Barbra Streisand’s Oct. 11 and Oct. 13 shows run as high as $716.65 – and on secondary markets like StubHub people were asking as much as $34,000.